Pneumatic tracker-bar.



PATBNTED SEPT. 27, 1904. P. WUEST, JR. PNEUMATIC TRACKER BAR.

APPLICATION FILED JAN 19,1904.

NO MODEL.

LCIEHZGIZHZC! WITNESSES:

INVENTOR: P///l/P 17/1/52 we,

UNITED STATES Patented September 27, 1904.

PATENT @EETQE.

PNEUMATIC TRACKER-BAR.

SPECIFICATION forming part of Letters Patent No.'7'70,'790, datedSeptember 27, 1904.

Application filed January 19, 1904. Serial No. 189,731. (No model.)

To all whom it may concern:

Be it known that I, PHILIP WuEs'r, Jr., of Philadelphia, in the State ofPennsylvania, have invented certain new and useful Improvements inPneumatic Tracker-Bars, whereof the following is a specification,reference be ing had to the accompanying drawings.

My invention relates to a musical instrument comprising a pneumatictracker-bar provided with apertures over which perforated webs of paperor similar fabric are progressed to control the operation of pneumaticvalves in the instrument. Heretofore, such trackerbars have comprisedpieces of wood glued together to embody a series of adjoiningrectangular ducts respectively in communica: tion with the adjoiningapertures in the face of the tracker-bar or have comprised a metallicface-plate embodying the series of apertures and directly supportingdiverged sheetmetal nozzles in connection with tubes leading to thepneumatic valves in the instrument.

It is the object of my invention to provide a metallic tracker-bar whichis more substantial and durable than the wooden structures aforesaid,which may be more readily and economically constructed than the priormetallic tracker-bars aforesaid, and which independently of itsface-plate affords a substantial support for the nozzle-terminals of thetubes leading to said valves.

A tracker-bar constructed in accordance with my invention. ashereinafter described, comprises a primarily-separate face-plate ofmetal containing a series of apertures. Said face-plate is permanentlyconnected with a solid bar of metal having circular-drilled duets, whichducts respectively correspond and are in registry with the apertures insaid faceplate immediately adjoining the latter and terminate remotefrom each other at another face or side surface of said bar in nozzleswhich are permanently secured in and supported by said bar independentlyof said faceplate and are respectively connected with tubes leading tothe pneumatic valves in the instrument.

My invention comprehends the various novel features of construction andarrangement hereinafter more definitely specified.

In said drawings, Figure I is a front view of a tracker-bar convenientlyembodying my improvements, the central portion being broken away. Fig.II is a transverse sectional View of said tracker-bar, taken on the lineII II in Fig. I. Fig. III is a longitudinal sectional view of saidtracker-bar, taken on the line III III in Figs. I and II. Fig. IV is atransverse sectional view of a modih'ed form of trackerbar embodying myimprovements. Fig. V is a longitudinal sectional view of saidtrackerbar, taken on the line V V in Fig. IV. Fig. VI is a front "iew ofa portion of the face-plate shown in Fig. I, illustrating differentsteps in its construction.

In said figures, I is the face-plate, which is first drilled to form aseries of circular perforations 2. (Shown at the right-hand side of Fig.VI.) The metal between pairs of said perforations is then removed,conveniently by a punching operation, to form apertures 3, elongated inthe direction of the length of said face-plate. Said apertures 3 arethen filed at their ends and when finished, as at I, are of uniformrectangular cross-sectional area throughout the thickness of said plate1.

Referring to the form of my invention shown in Figs. II and III, thesolid metal bar 5 is drilled through its front surface to form a seriesof ducts 6 in straight alinement and in correspondence with the seriesof apertures L in the face-plate. Said bar 5 is then drilled fromrespectively opposite sides 7 and 8 to form ducts 9 and 10, whichrespectively communicate with alternate ducts 6 in said series. Theducts IQand 13 are then drilled through the rear surface 14: of said barparallel with said ducts 6 and respectively in communication with saidducts 9 and 10. The ends of said ducts 9 and I0, primarily openingthrough the sides 7 and 8 of said bar 5, are finally closed by plugs 15,which, as indicated in Fig. II, may be conveniently formed fromround-headed screws, whose heads 16 are subsequently removed, so as toleave the 9 outer ends of said plugs flush with the side surfaces ofsaid bar. It IS to be understood,

said ducts 9 and 10 in lieu of said screw-plugs 15. The outer ends ofsaid ducts 12 and 13 are conveniently recessed, as indicated at 17 and18, to receive nozzles 19 and 20, which. being tightly driven in saidrecesses, are adapted to engage the terminals of the flexible tubes 21and 22, leading to the pneumatic valves within the musical instrument.

In the form of my invention shown in Figs. IV and V a metallicface-plate 1, such as is shown in Figs. I and II, is mounted upon thesolid metal bar 24, which has a series of ducts 25 drilled through itsfront face 26 in correspondence with the apertures t in said faceplateI, like the ducts 6, (shown in Figs. II and III,) except that said ducts25 are conveniently drilled to different depths, as indicated in Fig. V,so as to communicate with ducts 27 and 28, which are drilled diagonallythrough the side face 29 of said bar 24 in staggered relation. The outerends of said ducts 27 and 28 are recessed at 30 and 31 to receive thenozzles 32 and 33, which are adapted to engage the terminals of theflexible tubes 34 and 35, leading to the pneumatic valves in the musicalinstrument. Said faceplates land bars 5 or 24 being provided withcorresponding apertures and ducts, the contiguous faces of said platesand bars are separately coated With films of solder, and said membersbeing assembled in proper relation are then permanently connected byheating them until their solder-coated surfaces are fused together.During the soldering operation aforesaid it is of course necessary tomaintain said members in proper relative position by dowel-pins or bytemporary attaching means, such as wires or clamps.

It is obvious that various modifications may be made in the details ofmy invention without departing from its essential features. Therefore Ido not desire to limit myself to the precise details of construction andarrangement herein set forth.

I claim 1. In a tracker-bar, the combination with a metallic face-plateprovided with a series of apertures; of a solid metal back barpermanently secured to said face-plate, comprising a series ofcircular-drilled ducts, whose front ends respectively register with theapertures in said face-plate and whose rear ends terminate remote fromeach other at another side surface of said bar, substantially as setforth.

2. In a tracker-bar, the combination with a metallic face-plate providedwith a series of apertures; of a solid metal back bar permanentlysecured to said face-plate, comprising a series of circular-drilledducts, whose front ends respectively register with the apertures in saidface-plate and whose rear ends terminate remote from each other atanother side surface of said bar; recesses in the rear ends of saidducts; and, nozzles fitted in said recesses, substantially as set forth.

3. In a tracker-bar, the combination with a metallic face-plate providedwith aseries of apertures of rectangular cross-sectional area throughoutthe thickness of said plate; of a solid metal back bar permanentlysecured to said face-plate, comprising aseries of circulardrilled ducts,whose front ends respectively register with the apertures in saidface-plate and whose rear ends terminate remote from each other atanother side surface of said bar, substantially asset forth.

4. In a tracker-bar, the combination with a metallic face-plate providedwith a series of apertures; of a solid metal back bar permanentlysecured to said face-plate, comprising a series of circular-drilledducts, whose front ends respectively register with the apertures in saidface-plate and whose rear ends termi nate remote from each other instaggered relation, forming two series respectively comprising thealternate ducts throughout the length of said bar, substantially as setforth.

5. In a tracker-bar, the combination with a metallic face-plate providedwith a series of apertures; of a solid metal back bar permanentlysecured to said face-plate, comprising a series of circular-drilledducts, whose front ends respectively register with the apertures in saidface-plate and whose rear ends terminate remote from each other instaggered relation, forming two series respectively comprising thealternate ducts throughout the length of said bar; recesses in the rearends of said ducts; nozzles fitted in said recesses and having theirfree ends eccentric to the axes of the front ends of said ducts,substantially as set forth.

6. In a tracker-bar, the combination with a metallic face-plate providedwith a series of apertures; of a solid metal back bar permanentlysecured to said face, comprising a series of circular-drilled ducts,whose front ends respectively register with the apertures in saidface-plate and whose rear ends are in staggered relation to each other;recesses in the rear ends of said ducts; metallic nozzles fitted in saidrecesses; and, means permanently securing said face-plate, bar andnozzles in fixed relation, substantially as set forth.

7. In a tracker-bar, the combination with a metallic face-plate providedwith a series of apertures; of a solid metal back bar permanentlysecured to said face-plate, comprising a series of circular-drilledducts extending to two side surfaces of said bar; and, plugs closingsaid ducts at one side of said bansubstantially as set forth.

8. In a tracker-bar, the combination with a metallic face-plate providedwith a series of apertures; of a solid metal back bar permanentlysecured to said face-plate, comprising a series of circular-drilledducts, respectively registering with the apertures in said faceplate;and, another series of ducts respectively in communication with thefirst series aforesaid and opening through another side surface of saidbar, in eccentric relation to said first series of ducts, substantiallyas set forth.

9. In a tracker-bar, the combination with a metallic face-plate providedwith a series of apertures; of a solid metal back bar permanentlysecured to said face-plate, comprising a series of circular-drilledducts, extending at right angles to said face-plate; a second series ofcircular drilled ducts in communication with the first series aforesaidand opening through another side surface of said bar; and, plugs closingsaid ducts at one side of said bar, substantially as set forth,

10. In atracker-bar, the combination with a metallic face-plate providedwith a series of apertures; of a solid metal back bar permanentlysecured to said face-plate, comprising a series of circular-drilledducts, extending at right angles to said face-plate; a second series ofcircular-drilled ducts in communication with the first series aforesaidand opening through another side surface of said bar; plugs in the outerends of said second series of ducts; a third series of ducts incommunication with said second series of ducts, opening through anotherside surface of said bar; and, nozzles in the outer ends of said thirdseries of ducts, substantially as set forth.

11. In a tracker-bar, the combination with a metallic face-plateprovided with a series of apertures adjoining each other in straightlongitudinal alinement; of a solid metal back bar permanently secured insaid face-plate, comprising a series of circular-drilled ducts extendingat right angles to said face-plate; a

second series of circular-drilled ducts in communication with the firstseries aforesaid and opening through another side surface of said bar;plugs in the outer ends of said second series of ducts; a third seriesof ducts in communication with said second series of ducts, openingthrough another side surface of said bar; recesses in the outer ends ofsaid third series of ducts; nozzles respectively seated in saidrecesses; and, means securing said faceplate, bar, plugs and nozzles inpermanent relation, substantially as set forth.-

12. In a tracker-bar, the combination with a face-plate provided with aseries of apertures; of a solid metal back bar permanently secured tosaid face-plate and comprising a series of circular-drilled ducts.extending at right angles to said face-plate and terminating ineccentric relation to said apertures, substantially as set forth.

13. In a tracker-bar, the combination with a face-plate provided with aseries of apertures, of rectangular cross-sectional area; of a solidmetal back bar permanently secured to said face-plate and comprising aseries of circulardrilled ducts, extending at right angles to saidface-plate, and terminating in eccentric relation to said apertures,substantially as set forth.

In testimony whereof I have hereunto signed my name at Philadelphia,Pennsylvania, this 16th day of January, 1904.

PHILIP \VUEST, JR.

WVitnesses:

ARTHUR E. PAIGE, ANNA F. GEIZFREAD.

